Blow molding is the manufacturing process of forming hollow plastic parts. Generally speaking, there are three main types of blow molding: extrusion blow molding, storage cylinder hollow blow molding machine, injection molding and injection stretch blow molding. The blow molding process begins with the melting of plastics and the formation of semi-finished products or injection and injection molding preforming. A billet is a tubular piece of plastic with a hole at one end through compressed air.
Then the clamping shape and air are blown in. The air pressure in the blow molding machine then matches the plastic mold. Once the plastic is cooled and hardened, the mold opens and the cosmetic bottles blow molding machine, and the finished plastic container is produced.
In extrusion blow molding (blow molding machine), the plastic is melted and extruded into a hollow tube (blank). The blank is then captured by turning it off into a cooling mold. The air is then blown into the blank and filled with the shape of a hollow bottle, container or part. After the plastic is fully cooled, the mold is opened, the plastic blower is blown out, and part is expelled.  continuous and intermittent is the two changes of extrusion blow molding. In continuous extrusion blow molding the blank is extruded continuously, jiangsu blow molding machine, each component is cut through proper knife. There are two processes in intermittent blow molding: the direct interval is similar to the injection molding, and the screw turns, then stops and promotes the fusion. With the accumulator method, the accumulator is fused with plastic and when the mold has cooled and enough plastic has been accumulated, the extruded plastic and formed blank. In this case, the screw can rotate continuously or intermittently.  the weight of the continuous extruded billet is used to make the calibration wall thick and difficult. Accumulator head or reciprocating screw method used for hydraulic system, by adjusting the die clearance and parison programming device quickly push the parison the effect of weight, and allows precise control of wall thickness.